instant team mailing list archive

["Martin Sandve Alnæs" <martinal@xxxxxxxxx>]

1) You should send jitobject as the signature to build_module.
2) Your jitobject doesn't implement __hash__, the only thing dict will
use then is the object id.

I don't know how to best compute an efficient hash value here.

--
Martin


2008/9/6 Anders Logg <logg@xxxxxxxxx>:
> On Sat, Sep 06, 2008 at 02:29:21PM +0200, Martin Sandve Alnæs wrote:
>> 2008/9/6 Anders Logg <logg@xxxxxxxxx>:
>> > On Fri, Sep 05, 2008 at 10:50:37AM +0200, Martin Sandve Alnæs wrote:
>> >> I've added a test that times the cache mechanism, using
>> >> a signature object that sleeps for a second in sig.signature()
>> >> and half a second in sig.__hash__().
>> >> It's called test18.py. Seems to me that the cache works fine.
>> >
>> > I can't get it to work, but maybe I'm using it wrong.
>> >
>> > I'm running the bench/fem/jit/ test script in DOLFIN with the current
>> > version of FFC (just pushed) and I always get the following:
>> >
>> > --- Calling FFC JIT compiler ---
>> > 1. Module returned by import_module:  None
>> > 2. Calling FFC just-in-time (JIT) compiler, this may take some time... done
>> > 3. Creating Python extension (compiling and linking), this may take some time... done
>> > Assembling matrix over cells (finished).
>> >
>> > In step (1), Instant always returns None when calling import_module().
>> > I assume this means that the module was not found, neither in the
>> > in-memory cache nor disk cache.
>> >
>> > Since it returns None, FFC generates code in step (2). This takes a
>> > second or two.
>> >
>> > Then in step (3), FFC sends the generated code to build_module(). This
>> > goes surprisingly fast, so it seem Instant must return something from
>> > cache.
>> >
>> > So, something strange is going on, both in step (1) and (3). Here's
>> > the code for FFC's jit() which is now very short:
>> >
>> >    # Check options
>> >    options = check_options(input_form, options)
>> >
>> >    # Wrap input
>> >    jit_object = wrap(input_form, options)
>> >
>> >    # Check cache
>> >    module = instant.import_module(jit_object)
>> >    print "Module returned by import_module: ", module
>> >
>> >    # Compile form
>> >    debug("Calling FFC just-in-time (JIT) compiler, this may take some  time...", -1)
>> >    signature = jit_object.signature()
>> >    compile(input_form, signature, options)
>> >    debug("done", -1)
>> >
>> >    # Wrap code into a Python module using Instant
>> >    debug("Creating Python extension (compiling and linking), this may take some time...", -1)
>> >    filename = signature + ".h"
>> >    (cppargs, path, ufc_include) = extract_instant_flags(options)
>> >    module = instant.build_module(wrap_headers=[filename],
>> >                                  additional_declarations=ufc_include,
>> >                                  include_dirs=path,
>> >                                  cppargs=cppargs,
>> >                                  signature=signature)
>> >    debug("done", -1)
>> >
>> >    # Extract form
>> >    exec("compiled_form = module.%s()" % signature)
>> >
>> > Can you spot something wrong?
>> >
>>
>> No... I'll try to run it.
>
> Thanks.
>
>> Btw:
>>
>> >    # Extract form
>> >    exec("compiled_form = module.%s()" % signature)
>>
>> This is clearer:
>>
>>     compiled_form = getattr(module, signature)()
>
> ok, I didn't know that was possible.
>
> --
> Anders
>
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